Tooth-mold.



K) mm mm w \A/immea .No.815,374. 'PATENTED' MAR.20,1,906.

E. PI ERREPONT. 1

, TOOTH MOLD. APPLICATION FILED NOV. 10, 1904. RENEWED JAN. 23,1906. 2 SHEETS-SHEET 1. v

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APPLICATION FILED NOV.10, 1904. RENEWED JAN. 23, 1906- F d U r f 6 Samoa Mm P PATENTED MAR. 20, 1906.

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UNITED STATES PATENT OFFICE.

"TOOTH-MOLD.

Specification of Letters Patent.

Patented March 26,,

Application filed. November 10, 1904:. Renewed. ATanuary Z S, 1906. Serial No. 297,449-

To'. all whom it may concern.-

Be it known that I, EVELYN PIERREP'ONT, doctor .of'dental surgery, a subject of the King of- Great Britain, residing at Bank Chambers, Oockspur street, London, England, have invented a new and useful Improvement in Tooth-Molds, of which the folowing is a specification.

, My invention relates to an improved mold for the molding of artificial teeth.

By. this invention I have endeavored to obviate the imperfections of the molds hitherto ordinarily in use for the like urpose, the chief of which are, first, the ormation of the mold of a multiplicity of parts, one of which'parts is in plaster; secondly, the necessity fora largrle number of working patternteeth, and, t 'rdly, the prevention of leakage, whereby thecolor of the teeth may be a ected, inasmuch as it is always necessary to mold one part 'of the tooth from material of a lighter color or shade to the remaining part, and any leakage from the mold disturbs the proper relation of the respective colors or shades.

. In the construction of my mold as adapted for incisor or other teeth I form it with a face having a raised part or buttress of brass on it which may be fixed or removable, as occasion requires, at the art formerly covered by'the frame with its p aster contents. I have the festoons or divisions between the teeth, which i were in the former construction formed by the plaster in the frame, made in my construction in brass and fixed on that part of the gate which formerly came in contact with the edge of the plaster in the frame.

In my construction I divide the matrix or matrices into three parts instead of two, as before, and I have only the lingual surface of the teeth in contactwith the absorbent material. Between the gate and the buttress or raised brass ortion of the face I leave a space adapte to receive a detachable and perfectly independent inset of suitable porous or absorbent material. This inset is adapted to close up the lin al side of the matrix, and consequently fu fils all'the urposes formerly attained by the back wit its plaster contents. Furthermore, in my systemit is not necessary to have any looseworking pattern-teeth Whatever.

In order to fit my mold for use, it is only necessary to assemble the parts and place the detachable inset in position.

The inset may be of any convenient shape. In practice, however, I find that a 'semicyhndrical rod or piece is the most generally appli* cable, inasmuch-as its contour enables me to apply it without alteration to the construc-.

tion of the various mineral teeth required. The inset may be of any absorbent material, orit may be a solid or hollow piece of a nonabsorbent material covered with a layer of any suitable absorbent. It is a practical ad.- vantage in working that the absor tion of moisture by this means is much quic er than by the means usually adopted for removing sur lus moisture from the-ordinary tooth mo ds. The semi'cylindrical inset is appli cable to the production of the various-sorts of teeth. For instance, in the case of pinteeth for vulcanite settings the curvature of the inset adapts it to fit or form the inner or lingual side of the shoulders or rejecting parts of the teeth. In the case a tooth= crown the inset is adaptedlikewise to form the curved lingual or inner side of the crown. By turning the semicylindrical inset with the fiat side down it will form a flatlsurface suit able for making the lingual side of ordinary fiat-back teeth. Finally, in the case of molars or bicuspid teeth for vulcanite or plate work the inset is' preferably in contact in this case also with the lingual surfaces of the teeth. Finally, there is considerable practical advantage in the fewness of parts required for producing very various patterns of teeth. {By

my system a mold having certain interchang able parts can produce at will incisor or canine teeth adapted for vulcanite pin-teeth or diatoric teeth or tooth-crowns, and in like manner with suitable molds I can produce .molars or-biscupids, in all cases without the use of working pattern-teeth.

In order more particularly to set forth invention, I have illustrated it in the accompanying drawings.

In the drawings, Figure 1 shows a front elevation, partly broken away, of a mold arranged for making front teeth, (crowns) Fig. 2 is, a section of Fig. l on the line A B. Fig. 3 is a plan view of Fig. 1. Fig. 4 is a front elevation, partly broken away, of a mold for forming pin teeth, (flat backs Fig. 5, a section of Fi .4 on the line C D; Fig. 6, a plan view of mo d, illustrated in Fig. 4. Fig. 7 shows a mold arranged for making bicuspids or molars; Fig. 8, a section of Fig. 7

on the line E F; Fig. 9, a plan view, partly no broken away, of Fig. 7. The principle of these molds is throughout the same, the arrangement being only varied in detail to acco'mmodate them to the different patterns and shapes of teeth required.

In the drawings the gate isindicated by a, the matrix by b, and the inset by c.

The letter d indicates the fastening or clamping device. This may be simply a pivoted clamp, as shown in Figs. 1, 2, and 3, but for certain molds in which molars or bicuspids or other teeth are to be formed, such as illustrated in Figs. 4, 5, 6, 7, 8, and 9, it is necessary that that part of the mold described as the buttress should be capable of being withdrawn to enable the tooth to be readily removed from the mold. For this purpose I attach to the mold two swinging blocks 6, on which the clips or clamps are pivoted and which can be turned down, so as to enable the back of the mold to be withdrawn and the teeth to be readily taken out.

The inset 0 may be of any suitable absorbent or of ebonite, brass, wood, or other substance covered with any absorbent or other convenient porous material.

One great advantage of my mold as above illustrated is that by having various interchangeable parts adapted to the different kinds of teeth the face of the mold remains the same and can be used for molding the various kinds of teeth required.

What I clalm is v v 1. In a mold for making artificial teeth a detachable inset havin the inner surface shaped to the contour of the lingual surfaces of said teeth, the other portions of said mold having the remaining contours of said teeth entirely formed in them, all said parts rigidly and detachably connected.

2. In a mold for making artificial teeth, a gate-piece integral with a portion of the teethmatrices, festoons between said matrices and integral with the gate-piece, a face-piece integral with the front portions of the said teeth-matrices, a raised buttress on said facepiece adapted to act as the frame, a detachable absorbent inset adjacent to and forming the lingual side of the said teeth-matrices and means for retaining the separate pieces in the operative position.

3. In a mold for making artificial teeth, a metallic gate-piece having a series of depressions, sald depressions forming portions of teeth-matrices, raised portions (festoons) integral with said gate-piece and se )arating said matrices, a gate-piece integrai with a portion of the teeth-matrices, festoons between said matrices and integral with the ate-piece, a face-piece integral with the front portions of the said teeth-matrices, a

raised buttress on said face-piece adapted to act as the frame, a detachable absorbent inset adjacent to and forming the lingual side of the said teeth-matrices, perforated swinging blocks pivotally attached to the said facepieoe and clips on said block adapted to hold the parts of the mold together.

4. In a dental mold for making artificial molars and'bicuspids, a metallic gate-piece having a series of depressions forming the rear part of the teeth-matrices, fcstoons integral with said gate-piece and separating said matrices, a face-piece integral with the front portions of the teeth-matrices, festoons between said matrices integral with the face piece, a raised buttress on said face-piece adapted to act as the frame, the absorbent inset 0 adjacent to and forming part of the lingual side of said teeth-matrices, a detachable buttress adjustable between the face-piece and the inset, tooth-crown matrices on said buttress, and means for retaining the separate pieces in the operative position.

5. In a mo d for making artificial teeth, the metal gate-piece a adapted to form a portion of the teeth-matrices, the face-piece 1) adapted to form another portion of the teethmatrices, the absorbent inset c and the swinging buttresses c on said face-piece provided with clips (1.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

EVELYN PIERREPONT.

Witnesses:

LEONARD E. HAYNES, JOHN A. JORDAN. 

